local Observable = require "rx.observable"

--- Returns an Observable that terminates when the source terminates but does not produce any
-- elements.
-- @returns {Observable}
function Observable:ignoreElements()
    return Observable.create(function(observer)
        local function onError(message)
            return observer:onError(message)
        end

        local function onCompleted()
            return observer:onCompleted()
        end

        return self:subscribe(nil, onError, onCompleted)
    end)
end